Question

While examining a specimen under the microscope Janet discovers a structure that has some genetic material that has rna but not dna what is the specimen

Answer 1

It's most likely a virus. They can have either DNA or RNA, but aren't capable of having both. 

Answer 2

Virus.

Step-by-step explanation:

DNA is present as the genetic material of all the living organisms except some viruses. DNA increase its copy number(replication),the information from DNA changes to RNA(transcription) and further into the proteins(translation) is known as central dogma of life.

Janet discovers a structure that has some genetic material same as RNA, the specimen must be virus. These viruses are known as retroviruses. Virus that has RNA as genetic material contains a special enzyme that converts RNA into DNA. This enzyme is known as reverse transcripatse.

Thus, the specimen is virus.